Add salt and soda to boiling water, put in potatoes. Cook for 15-20 minutes until done. Drain the water from the cooked potatoes.
Heat a frying pan with vegetable oil. Fry the garlic and rosemary for 2 minutes until fragrant. Then remove the garlic and rosemary from the pan.
Mix the boiled potatoes with the resulting aromatic oil, add salt and pepper to taste. Place the potatoes in a baking dish and bake in the oven for 10-12 minutes at 200°C until golden brown. The finished potatoes can be sprinkled with rosemary and garlic, which are left over from making the oil.